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Materials Science Science Fair Project

Hardening Alloys

Hardening Alloys | Science Fair Projects | STEM Projects
Have you ever wondered how to make alloys like steel, nickel, and titanium harder? In this project, you'll find out how to increase the hardness of alloys by aging them at high temperatures.


The hypothesis is that the alloy’s hardness will increase when aged at higher temperatures.

Method & Materials

You will test the hardness of three different alloys (nickel, titanium, and steel) by aging them at different temperatures. You will measure the hardness of the alloys using a portable Rockwell hardness tester.
You will need a portable Rockwell hardness tester with accessories, a sheet of Nickel alloy (Inconel 6.25), a sheet of Titanium alloy (Ti6A14V), a sheet of steel alloy (1018), sand paper, tap water, and a high temperature dry box oven.


The results showed that the hardness of nickel and steel alloy started to decline after aging them at 800 °C. Titanium alloy hardness started to decline after aging at 1000 °C.

Why do this project?

This science project is interesting because it shows how alloys can be treated to increase their hardness and toughness.

Also Consider

Experiment variations could include testing the maximum aging temperature for different types of alloys, or aging for longer periods of time and comparing the hardness of the alloys.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related videos

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